UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

cifs: invalidate cache when we truncate a file 

RHBZ: 1566345

When truncating a file we always do this synchronously to the server.
Thus we need to make sure that the cached inode metadata is
marked as stale so that on next getattr we will refresh the metadata.
In this particular bug we want to ensure that both ctime and mtime
are updated and become visible to the application after a truncate.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reported-by: Xiaoli Feng <xifeng@redhat.com>
This commit is contained in:
Ronnie Sahlberg 2018-05-24 06:54:27 +10:00 committed by Steve French
parent e0386e449a
commit 57c55cd7c7
1 changed files with 9 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
fs/cifs/inode.c
View File

@ -746,7 +746,8 @@ cifs_get_inode_info(struct inode **inode, const char *full_path,
cifs_dbg(FYI, "Getting info on %s\n", full_path);
if ((data == NULL) && (*inode != NULL)) {
if (CIFS_CACHE_READ(CIFS_I(*inode))) {
if (CIFS_CACHE_READ(CIFS_I(*inode)) &&
CIFS_I(*inode)->time != 0) {
cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
goto cgii_exit;
}
@ -1857,15 +1858,15 @@ cifs_inode_needs_reval(struct inode *inode)
struct cifsInodeInfo *cifs_i = CIFS_I(inode);
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
if (cifs_i->time == 0)
return true;
if (CIFS_CACHE_READ(cifs_i))
return false;
if (!lookupCacheEnabled)
return true;
if (cifs_i->time == 0)
return true;
if (!cifs_sb->actimeo)
return true;
@ -2104,10 +2105,14 @@ static int cifs_truncate_page(struct address_space *mapping, loff_t from)
static void cifs_setsize(struct inode *inode, loff_t offset)
{
struct cifsInodeInfo *cifs_i = CIFS_I(inode);
spin_lock(&inode->i_lock);
i_size_write(inode, offset);
spin_unlock(&inode->i_lock);
/* Cached inode must be refreshed on truncate */
cifs_i->time = 0;
truncate_pagecache(inode, offset);
}